API Limits with #FDEC

The FireDAC Enterprise Connectors (#FDEC) by CData and Embarcadero make it really easy to work with various APIs just like you would any SQL database. For example if you want to publish the results of a query to a Google Sheet (which I find incredibly useful) then it is just a few FireDAC components and you are off to the races. You might run into an API limit though.

What is an API limit? Most rest services have a limit to how often a client can call a specific API within a certain amount of time. Google calls this their usage limit:

This version of the Google Sheets API has a limit of 500 requests per 100 seconds per project, and 100 requests per 100 seconds per user. Limits for reads and writes are tracked separately. There is no daily usage limit.

That may seem like a lot, but I found I was running into that limit pretty quick once I moved my project into production. Luckily FireDAC and the FireDAC Enterprise Connectors have a simple workaround: Batch Processing.

Using the Array DML features of FireDAC you can batch multiple DML (Data Manipulation Language) operations into a single API call. The FDEC Google Sheets documentation from CData doesn’t cover Array DML, but the component supports this (they are updating the documentation). The Elasticsearch documentation does cover Batch Processing with an example, and I’ve used this with Sheets and it works great!

Bulk Insert

The following example prepares a single batch that inserts records in bulk.

Comments

Super user Admin A73
Friday, 14 September 2018

That may seem like a lot, but I found I was running into that limit pretty quick once I moved my project into production. Luckily FireDAC and the FireDAC Enterprise Connectors have a simple workaround Batch Processing. https://braketimeusa.com/